Many thanks for these lovely comments friends. I think also The Grateful Dead are well known for having this song in their repertoire. This style in which I played it I basically learnt by listening to one of Lil rev's rekkids a few years back. He was a big inspiration to me when I first began playing ukulele.
I've been playing this song since I first heard The Greenbriar Boys do it in the sixties. I love your version and you've given me a second verse that the GB Boys didn't do. Super job!